OEMTOOLS Tools 22887 5/8 Inch 3/8 Inch Drive Magnetic Spark Plug Socket Knurling position is optimized for best finger gripping position Smooth satin finish is easy and clean Magnetic sockets won't wear out or be damaged by oil Deep marking for easy identification Knurling position is optimized for best finger gripping position Smooth satin finish is easy to clean, won't show prints and keeps rust away Magnetic Sockets won't wear out or be damaged by oil Comes with a limited lifetime warranty